Question

我已经审核了很多很多回复，仍然无法使用csv文件预加载rails 5 table。这是我第一次尝试从rails控制台加载数据。请帮忙！

csv文件格式与CSV.foreach（）

相关

["model_id", "model_make_id", "model_name", "model_trim", "model_year", "model_make_display_name"]
["44328", "acura", "MDX", nil, "2011", "Acura"]
["44331", "acura", "RDX", nil, "2011", "Acura"]
["44332", "acura", "RDX", "SH-AWD", "2011", "Acura"]
["44334", "acura", "RL", nil, "2011", "Acura"]
["44337", "acura", "TL", nil, "2011", "Acura"]

.rb文件代码

require 'csv'

CSV.foreach('./tmp/cq_sample.csv', :headers => true) do |row|
  record = Cqref.new(
    :model_id                 => row[0], # first column of csv file
    :model_make_id            => row[1], # second column
    :model_name               => row[2], # third
    :model_trim               => row[3], # fourth
    :model_year               => row[4], # fifth
    :model_make_display_name  => row[5]  # sixth
  )
  record.save
end

模式

create_table "cqrefs", force: :cascade do |t|
    t.string   "model_id"
    t.string   "model_make_id"
    t.string   "model_name"
    t.string   "model_trim"
    t.string   "model_year"
    t.string   "model_make_display_name"
    t.datetime "created_at",              null: false
    t.datetime "updated_at",              null: false
  end

错误消息提取：

require './tmp/importcsv'
ActiveRecord::DangerousAttributeError: model_name is defined by Active Record. Check to make sure that you don't have an attribute or method with the same name.
        from /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.0.2/lib/active_record/attribute_methods.rb:91:in `instance_method_already_implemented?'
        from /usr/local/rvm/gems/ruby-2.3.0/gems/activemodel-5.0.2/lib/active_model/attribute_methods.rb:288:in `block in define_attribute_method'

将带标题的CSV加载到rails中

0 个答案: